Multiplexed scanning microscopy with dual-qubit spin sensors
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916995156410368 |
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| author | Huxter, William S. Dalmagioni, Federico Degen, Christian L. |
| author_facet | Huxter, William S. Dalmagioni, Federico Degen, Christian L. |
| contents | Scanning probe microscopy with multi-qubit sensors offers the potential to improve imaging speed and measure previously inaccessible quantities, such as two-point correlations. We develop a multiplexed quantum sensing approach with scanning probes containing two nitrogen-vacancy (NV) centers at the tip apex. A shared optical channel is used for simultaneous qubit initialization and readout, while phase- and frequency-dependent microwave spin manipulations are leveraged for de-multiplexing the optical readout signal. Scanning dual-NV magnetometry is first demonstrated by simultaneously imaging multiple field projections of a ferrimagnetic racetrack device. Then, we record the two-point covariance of spatially correlated field fluctuations across a current-carrying wire. Our multiplex framework establishes a method to investigate a variety of spatio-temporal correlations, including phase transitions and electronic noise, with nanoscale resolution. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_19576 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiplexed scanning microscopy with dual-qubit spin sensors Huxter, William S. Dalmagioni, Federico Degen, Christian L. Quantum Physics Mesoscale and Nanoscale Physics Applied Physics Scanning probe microscopy with multi-qubit sensors offers the potential to improve imaging speed and measure previously inaccessible quantities, such as two-point correlations. We develop a multiplexed quantum sensing approach with scanning probes containing two nitrogen-vacancy (NV) centers at the tip apex. A shared optical channel is used for simultaneous qubit initialization and readout, while phase- and frequency-dependent microwave spin manipulations are leveraged for de-multiplexing the optical readout signal. Scanning dual-NV magnetometry is first demonstrated by simultaneously imaging multiple field projections of a ferrimagnetic racetrack device. Then, we record the two-point covariance of spatially correlated field fluctuations across a current-carrying wire. Our multiplex framework establishes a method to investigate a variety of spatio-temporal correlations, including phase transitions and electronic noise, with nanoscale resolution. |
| title | Multiplexed scanning microscopy with dual-qubit spin sensors |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2407.19576 |